electric circuit visual inspections course objectives discussion and review of electrical inspection...
TRANSCRIPT
ELECTRICAL ITEMS
• CABLE SIZE
• CABLE CONDITIONS
• CABLE CONNECTORS ?
• STRAIN RELIEF ?
• MOTORS (SIZE, MECHANICAL CONDITION, LOCATION
A-PROCEED TO THE MCC TO GATHER ELECTRICAL
INFORMATION IF POSSIBLE
• INDICATOR LIGHTS BEING USED ?
• WHAT ARE THE STARTER TYPES?
• WHAT CONDITION ARE THEY IN?
• HOUSKEEPING
• FUSES LAYING AROUND, ETC.
NEC 430-152NEC 430-52
430-81430-98
430-28
430-61,62
430-31,44
430-101,113
430-21,29
430-21-29400-5A,B
TABLES 310
430-51,58,TABLE 431-152
MOTOR BRANCH CIRCUIT /SHORT CIRCUIT AND
GROUND FAULT PROTECTION
• RATING OR SETTING FOR INDIVIDUAL MOTOR CIRCUITS
• NEC 430-152, ALSO REFER TO 430-52
ELECTRICAL ITEMS TO LOOK AT
• LOCKS
• SIGNS
• FENCE CONDITION & HEIGHT
• GROUNDING
• HOUSEKEEPING
• PERSONNEL AUTHORIZED TO ENTER
• HOW OFTEN DO THEY ENTER
SUBSTATION CHECKS
• CHECK FOR OBVIOUS HAZARDS BEFORE ENTERING
• LOOSE OR BROKEN SUPPORTS
• LOOSE CONDUCTORS
• DRY VEGETATION WITHIN 25 FOOT
• FIRE EXTINGUISHERS
CHECK TRANSFORMER CONNECTIONS
PRIMARY - CONFIGURATION ?
SECONDARY- CONFIGURATION WYE---------DELTA ?
• 1-CORDS (EXTENSION, LIGHT, WELDER LEADS)
• LABELING
• COVERS MISSING
• BUSHINGS/STRAIN RELIEFS
OTHER ELECTRICAL INSPECTION ITEMS
ELECTRICAL VIOLATION HISTORY 2000
M/NM ONLY
• 63,624 TOTAL VIOLATIONS ISSUED
• 9,516 VIOLATIONS ISSUED (SURFACE)
• 1,157 VIOLATIONS ISSUED (UG)